Ronnie O’Sullivan continues his quest for a history-making eighth world title against Si Jiahui after John Higgins takes 5-3 lead over fellow ‘Class of ‘92’ veteran Mark Williams

Ronnie O’Sullivan resumes his world championship quarter-final this morning against Si Jiahui with a commanding 6-2 lead.

The seven-time champion twice saw his 22-year-old opponent pull back to within two frames before securing his 14th appearance in the last four.